Repeated Question- How to upload a Large Bitmap (1600*1600 Pixel)

[Madhu_Rani]

Hi, I have an SDI based application. The view class has a base class CScrollView to accomodate large data. Horizontal and Verticals scrolls can be used for navigation. Now I want to upload a bitmap having larger dimension but I am unable to do it. The client view accomodate only normal size of bitmap say (700*1100)... so what shold I do... Also One have to write code in OnDraw() as when he navigates, so that bitmap upload again and the stuff is full of flickers. even then I could not view the EXTREME BOTTOM and EXTREME RIGHT of the image. Please guide?

[Cedric Moonen]

Did you look at CScrollView::SetScrollSizes[^] ?

Cédric Moonen Software developer
Charting control [v2.0] OpenGL game tutorial in C++

[Madhu_Rani]

YES. I already set them to 1600. void CTRYView::OnInitialUpdate() { CScrollView::OnInitialUpdate(); CSize sizeTotal; // TODO: calculate the total size of this view sizeTotal.cx = sizeTotal.cy = 1600; SetScrollSizes(MM_TEXT, sizeTotal); } BUT no benefit?

[Prasann Mayekar]

use the setscrollsizes() function just before u try to load the image on the screen. there is no need to handle drawing on scroll, onDraw automatically is called. to avoid the flickering problem, u can try using memory DC by using the CreateCompatibleDC() and CreateCompatibleBitmap() functions. once the drawing is done, use the BitBlt() or stretchBlt to draw this to ur main Device context. Pras who else

[Madhu_Rani]

use the setscrollsizes() function just before u try to load the image on the screen. YES u are right . I called setscrollsizes() in OnInitialUpdate() whereas I load the bitmap against a menu click but still it is not working. :((